Vue-toRef

一：Vue 3.0 1：toRef

将一个对象的属性变为响应式的对象。
原始写法：

<template>
    <h2>姓名: {{ person.name }}</h2>
    <h2>年龄: {{ person.age }}</h2>
    <h2>薪资: {{ person.job.j1.salary }}</h2>
    <button @click="person.name+='~'">修改姓名</button>
    <button @click="person.age++">修改年龄</button>
    <button @click="person.job.j1.salary++">涨薪</button>
</template>
<script>
import {reactive} from 'vue';

export default {
    name: "Demo",
    setup() {
        let person = reactive({
            name: '张三',
            age: 18,
            job: {
                j1: {
                    salary: 20
                }
            }
        })
        return {
            person,
        }
    }
}
</script>

toRef写法

<template>
    <h2>姓名: {{ name }}</h2>
    <h2>年龄: {{ age }}</h2>
    <h2>薪资: {{ salary }}</h2>
    <button @click="name+='~'">修改姓名</button>
    <button @click="age++">修改年龄</button>
    <button @click="salary++">涨薪</button>
</template>
<script>
import {reactive, toRef, toRefs} from 'vue';

export default {
    name: "Demo",
    setup() {
        let person = reactive({
            name: '张三',
            age: 18,
            job: {
                j1: {
                    salary: 20
                }
            }
        })
        return {
            name: toRef(person, "name"),
            age: toRef(person, "age"),
            salary: toRef(person.job.j1, "salary"),
        }
    }
}
</script>

roRefs写法：
toRefs只能解构一层。

<template>
    <h2>姓名: {{ name }}</h2>
    <h2>年龄: {{ age }}</h2>
    <h2>薪资: {{ job.j1.salary }}</h2>
    <button @click="name+='~'">修改姓名</button>
    <button @click="age++">修改年龄</button>
    <button @click="job.j1.salary++">涨薪</button>
</template>
<script>
import {reactive, toRef, toRefs} from 'vue';

export default {
    name: "Demo",
    setup() {
        let person = reactive({
            name: '张三',
            age: 18,
            job: {
                j1: {
                    salary: 20
                }
            }
        })
        return {
            ...toRefs(person)
        }
    }
}
</script>